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Pickering emulsion for improving oxidation stability of dispersed-phase grease and preparation method of Pickering emulsion

A technology of oil oxidation and dispersed phase, which is applied in the field of food processing, can solve the problems of easy oxidation of sterols, achieve good results, save costs, and improve oxidation stability

Active Publication Date: 2022-04-05
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of emulsion that can improve the oxidation stability of emulsion dispersed phase grease, can realize system anti-oxidation performance and stability control, to solve the problem existing in the prior art that the sterol that exists in the form of emulsion is easy to oxidize

Method used

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  • Pickering emulsion for improving oxidation stability of dispersed-phase grease and preparation method of Pickering emulsion
  • Pickering emulsion for improving oxidation stability of dispersed-phase grease and preparation method of Pickering emulsion
  • Pickering emulsion for improving oxidation stability of dispersed-phase grease and preparation method of Pickering emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. Preparation of Pickering emulsion

[0038]1. Preparation of Glyceride Dispersion Phase Containing Antioxidant

[0039] Antioxidants (tocopherol, resveratrol, lycopene) were dissolved in methanol solution and added to molten trimyristin at 80°C at a concentration of 446 μmol / kg.

[0040] 2. Adjust the content of glyceride dispersed phase

[0041] In a water bath at 80°C, the above-mentioned glyceride dispersed phase was added to a PBS solution containing 1% emulsifier sodium caseinate (NaCAS). Homogenize at a speed of 11,000rpm and stir at high speed for 1min. The obtained mixed solution was homogenized, and circulated 5 times at 400 bar under the condition of 80°C. A 5% w / w dispersion of CLP was prepared. The CLP dispersion was cooled to 4°C.

[0042] 3. Preparation of oil phase containing sterols

[0043] Add the phytosterol mixture to the walnut oil, stir to make it dissolve completely, and obtain an oil phase containing 0.5% w / w phytosterol.

[0044] 4. Pre...

Embodiment 2

[0071] 1. Preparation of Pickering emulsions with different materials

[0072] 1. Preparation of Glyceride Dispersion Phase Containing Antioxidant

[0073] Dissolve resveratrol in methanol solution, and add molten lipid (one or more of rice bran wax, palm wax, stearate, palmitate, arachidate, and linolenate) at 85°C. The formula of CLP glyceride is shown in Table 3.

[0074] 2. Adjust the content of glyceride dispersed phase

[0075] In a water bath at 80° C., the above-mentioned glyceride dispersed phase was added to a PBS solution containing 1% emulsifier (whey protein and sodium caseinate). Homogenize at a speed of 11,000rpm and stir at high speed for 1min. The obtained mixed solution was homogenized, and circulated 5 times at 400 bar under the condition of 80°C. A 5% w / w dispersion of CLP was prepared. The CLP dispersion was cooled to 4°C.

[0076] 3. Preparation of oil phase containing sterols

[0077] Add the phytosterol mixture to the rapeseed oil, stir to dissol...

Embodiment 3

[0089] 1. Preparation of Pickering emulsion

[0090] 1. Preparation of Glyceride Dispersion Phase Containing Antioxidant

[0091] Resveratrol was dissolved in methanol solution, and the molten tripalmitin was added at 80°C to a concentration of 446 μmol / kg.

[0092] 2. Adjust the content of lipid dispersed phase

[0093] In a water bath at 80° C., the above-mentioned glyceride dispersed phase was added to a PBS solution containing 1% emulsifier (soy protein isolate). Rotor-stator homogeneous stirring at a speed of 11,000rpm for 11min. The resulting mixture was homogenized and ultrasonicated for 20 minutes at 20Mhz frequency and 95% power while maintaining 80°C. Afterwards, a 5% w / w CLP dispersion was prepared by performing high-pressure homogenization at 400 bar for 5 cycles. The CLP dispersion was cooled to 4°C.

[0094] 3. Preparation of oil phase containing sterols

[0095]Add phytosterols (camesterol, brassicasterol, stigmasterol, sitosterol) to rapeseed oil, stir to...

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Abstract

The invention discloses a Pickering emulsion for improving oxidation stability of dispersed phase grease and a preparation method thereof, and belongs to the technical field of food processing. The Pickering emulsion is composed of a water phase, an oil phase serving as a dispersion phase and lipid colloid particles, the lipid colloid particles comprise glyceride and an antioxidant, and the glyceride is one or more of myristate, stearate, palmitate, linolenic acid and arachidonate. The Pickering emulsion is prepared by using the lipid colloid particle loaded antioxidant as the emulsifier, so that the antioxidant is specifically attached to the two-phase interface of the emulsion, the development of emulsion oxidation is restrained from the source, the oxidation stability of sterol in a dispersion phase is improved, and the action mode of the antioxidant and the sterol oxidation prevention effect are better. Meanwhile, the quality of the emulsion is improved, and the prepared antioxidant emulsion can be applied to the industries of food, health care products, medicines, biological products and cosmetics.

Description

technical field [0001] The invention relates to the technical field of food processing, in particular to a Pickering emulsion for improving the oxidation stability of dispersed phase oils, especially sterols, and a preparation method. Background technique [0002] Phytosterols (PS) and sterol esters are plant-derived sterol compounds that have a variety of beneficial physiological functions for the human body. Studies have found that phytosterols can competitively inhibit the absorption of cholesterol in the intestinal tract and significantly reduce the cholesterol content in human plasma. Reduce plasma low-density lipoprotein (LDL) synthesis, lower density lipoprotein cholesterol, prevent and treat cardiovascular diseases, immune regulation, anti-inflammation, inhibit cancer cell proliferation, etc. At the same time, because animals cannot synthesize PS endogenously, the human body can only obtain it by ingesting plant-derived food, so the development of phytosterol product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L29/10
CPCY02A40/90
Inventor 陆柏益杨博文赵添柳岩张钦俊
Owner ZHEJIANG UNIV
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